1 Section for Production and Health, Department of Large Animal Sciences, Faculty of Health and Medical Sciences, Københavns Universitet2 Production & Health, Department of Large Animal Sciences, Faculty of Life Sciences, Københavns Universitet3 Danish Agriculture and Food Council4 Production & Health, Department of Large Animal Sciences, Faculty of Life Sciences, Københavns Universitet5 Section for Production and Health, Department of Large Animal Sciences, Faculty of Health and Medical Sciences, Københavns Universitet